Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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Tether Facility Reboost• Use Electrodynamic Propulsion NearPerigee to Reboost Orbit– Collect electrons from ionosphere atone end of tether & emit electrons atother end of tether– Use power from batteries to push curentalong tether– Current interacts with geomagnetic fieldto give JxB force– Vary current to generate net thrust• To achieve Reboost in 30 days:– Solar Panel Power: 100 kW– Power To ED Tether: 300 kW– Currents: ~15 A• Issues:– High Power, High Voltage (20 kV)TUI/MMOSTT 22
Reboost Tuning• Electrodynamic thrusting possiblebelow 2000-2200 km• Must control thrusting to achievedesired final orbit– Otherwise perigee raised too much• Tether is rotating, so thrust directionvaries• Vary average thrust direction duringperigee pass to boost apogee andkeep perigee downTUI/MMOSTT 23
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Tethers Unlimited, Inc.MMOSTT Final
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NIAC Funded Tether Research• Moon
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Electrodynamic Reboost• Power sup
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Cislunar Tether Transport System•
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MXER Tethers Included in NASA’sII
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5mt Payload Tether Boost Facilityfo
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LEOGTO Boost Facility• Initial Fa
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Tether Boost FacilityControl Statio
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LEOGTO Boost Facility• TetherSim
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Rendezvous• Rapid AR&C Capability
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Proposed RETRIEVE TetherExperiment
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µTORQUE on Delta IV• Delta-IV Se
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Opportunities for NASATechnology De
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AIAA 2000-3842COMMERCIAL DEVELOPMEN
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--Commercial Tether Transport AIAA
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-Commercial Tether Transport AIAA 2
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Commercial Tether Transport AIAA 20
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Commercial Tether Transport AIAA 20
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Momentum Exchange/Electrodynamic Re
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DESIGN AND SIMULATION OF A TETHER B
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Tether Boost Facility Design AIAA 2
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Tethers Unlimited, Inc.Cislunar Tet
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Interim Report Outline- Configurati
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Mission Definition¥ Payload Capaci
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Baseline Control Station DetailsTET
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Baseline Grapple AssemblyCAPTURES A
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LEO Facility System ArchitectureGRA
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Payload Adapter Assembly Subsystems
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Potential Reeling FunctionsReeling
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LEO Control Station Weights16
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Payload Adapter Assembly Weights18
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Tether Boost FacilityRequired Power
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Electrical Propulsion Voltage´ Spe
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Potential Reeling FunctionsReeling
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Preliminary Reeling AnalysisθθAss
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Tether Boost FacilitySystem Require
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Table of Contents1 Scope ..........
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2 ReferencesThis section lists docu
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The system shall measure and contro
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4 Ground Rules & AssumptionsThis se
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Appendix F: Tether Boost Facility D
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Appendix F Tether Boost Facility De
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Appendix F Tether Boost Facility De
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Appendix L: Tether Boost Facility D
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Page 176 and 177: Appendix L: Tether Boost Facility D
Page 194 and 195: Tethers Unlimited, Inc.Tether Rende
Page 206 and 207: Ongoing Tether Work Under NIAC Fund
Page 208 and 209: Cislunar Tether Transport System•
Page 210 and 211: Rapid Earth-Mars Transport• Reusa
Page 212 and 213: EarthMars Launch Windows• MMOSTT
Page 214 and 215: Incremental Development Path1. TORQ
Page 216 and 217: LEOGTO Boost Facility• TetherSim
Page 218 and 219: Tether Boost FacilityControl Statio
Page 220 and 221: Modular Design• Design Components
Page 222 and 223: Payload Accommodation AssemblyConfi
Page 224 and 225: Electrodynamic Thrusting• Drive c
Page 228 and 229: Rendezvous• Rapid Automated Rende
Page 230 and 231: Rendezvous Method: Preparation• P
Page 232 and 233: Development Issues• Automated Ren
Page 234 and 235: Potential Flight Experiments• Hig
Page 236 and 237: Opportunities for NASATechnology De
Page 238 and 239: Acknowledgements• Boeing/RSS - Jo
Page 240 and 241: IAF-99-A.5.10RAPID INTERPLANETARY T
Page 242 and 243: Rapid Interplanetary Tether Transpo
Page 272 and 273: IAF-00-S.6.04TETHER SYSTEMS FOR SAT
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IAF-00-S.6.04Perigee Altitude (km)3
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IAF-00-S.6.04The LEO⇒GTO Tether B
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IAF-00-S.6.04AcknowledgmentsThis re
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Tethers Unlimited, Inc.Appendix K:
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Tethers Unlimited, Inc.at a rate of
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Tethers Unlimited, Inc.Appendix L -
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Tethers Unlimited, Inc.Appendixm M:
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Appendix N. MXER Tether for Deployi
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Electrodynamic Thrustingto Reboost
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100000 95000 90000 85000 80000 7500
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Momentum Exchange/Electrodynamic Re
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NOMENCLATURESymbol MeaningA payload
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DepartureangleA = 1.5π - (ω + u
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Tether material has a "characterist
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Rendezvous of Grapple with PayloadT
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adius vector to the new center of m
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days from payload pickup at one pla
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"JupiterandBeyond"Tether cut CUT:<
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Tethers Unlimited, Inc.Appendix Q:
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Tethers Unlimited, Inc.Appendix R:
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Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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